friction quotes

Only thestudyof militaryhistory iscapable of giving those who have no experience of their own a clear picture of what I have just called the friction of the whole machine.

- Karl von Clausewitz
  Principles of  War (translated by  J  J Graham).

The best machines and to be chosen aboveall others are those which consist of the fewest parts or which are the simplest, which produce the least friction; which are not too heavily loaded, and where the power can be convenientlyapplied without any waste.

-Jakob Leupold
  Theatrum machinarum.

In our lore, the Jewish family was an inviolate haven against every formof menace, frompersonal isolationto gentile hostility. Regardless of internal friction and strife, it was assumed to be an indissoluble consolidation† Family indivisibility, the first commandment.

- Philip Milton Roth
  The Facts: A Novelist's Autobiography,'Dear Zuckerman'.